Remove unnecessary imports.
diff --git a/emboss-format b/emboss-format
index 098cbe4..a0dd827 100755
--- a/emboss-format
+++ b/emboss-format
@@ -16,8 +16,6 @@
 
 """Standalone driver program for the Emboss formatter."""
 
-import argparse
-import os
 import sys
 
 from compiler.front_end import format